$db_conn = DB::factory('oci8'); //$result_conn = $db_conn->connect(DB::parseDSN('oci8://'.$DB_USER.':'.$DB_PASS.'@'.$DB_HOST.'/'.$DB_NAME)); //$result_conn=oci_connect("dbuser", "dbpassword", "dbhost");-- This works fine, but when this line uncommented and the one below commented out, nothing happens...blank page$result_conn = $db_conn->connect(DB::parseDSN("oci8://user:pw@host/host"));

Please note: Your connection string approach is a bit unusual for me. I have had great success with this: